US4213571A - Dust system for a grinder-mixer - Google Patents
Dust system for a grinder-mixer Download PDFInfo
- Publication number
- US4213571A US4213571A US06/026,261 US2626179A US4213571A US 4213571 A US4213571 A US 4213571A US 2626179 A US2626179 A US 2626179A US 4213571 A US4213571 A US 4213571A
- Authority
- US
- United States
- Prior art keywords
- grinding
- hammermill
- mixing
- dust collector
- mixing apparatus
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C13/00—Disintegrating by mills having rotary beater elements ; Hammer mills
- B02C13/26—Details
- B02C13/288—Ventilating, or influencing air circulation
Definitions
- the present invention relates generally to an agricultural grinder-mixer and more specifically to an improved dust collection system for removing the finely ground crop material suspended in the air from the hammermill area, separating this material within the dust collector thereby allowing the material to settle out, directing the settled out material back into the top of the hammermill and then transferring it into the hammermill discharge auger for delivery into the mixing tank.
- Grinder-mixers of the type commonly utilized today employ various dust collection systems to draw off the finely ground crop material particles that are suspended in the air from the area of the hammermill and cycle them through what is normally a centrifugal cyclone separator to centrifugally separate out the dust particles from the air. This technique permits the recovery of additional crop material which is then recycled down into the hammermill discharge auger or some type of transport means for delivery into the mixing tank. Numerous dust collection systems have been designed for this purpose with varying degrees of success. Regardless of the different designs that exist for agricultural grinder-mixer dust collection systems, all employ some sort of a suctioning device, such as a fan, to draw off the finely ground crop particles suspended in the air from an area generally adjacent the hammermill. The suctioning device or fan creates sufficient air flow to transport the suspended material to a particular collection and separating means.
- a suctioning device such as a fan
- the location of the fan in the dust collection system has even been the basis for variations in design approaches.
- Some designs have positioned a fan on the front side of the hammermill attached to the hammermill housing to minimize the amount of ground particles that are drawn off from the grain flow as it is transported rearwardly from the hammermill by the discharge auger into the mixing tank.
- This particular design arrangement ensures that primarily only the finely ground crop material particles of particular matter suspended in the air surrounding the hammermill are drawn off since the heavier less finely ground particles are conveyed rearwardly out of the back of the hammermill housing towards the mixing tank by the discharge auger.
- This placement of the fan is an improvement over those grinder-mixers which draw off the particulate crop material from the rear side of the hammermill. These latter grinder-mixers are much more likely to include in the air stream greater amounts of the less finely ground particles, even including portions of corn cobs, which are in the grain material flow being transported out the rear of the housing towards the mixing tank.
- grinder-mixer designs employ dust collection systems which return the settled out particulate crop material from the cyclone separator back into the hammermill discharge or unloading auger intermediately of the hammermill and the mixing tank.
- This type of design especially in grinder-mixers employing an air draw system from the rear of the hammermill, suffers from the disadvantage of tending to plug or clog the hammermill discharge auger at the point where the return chute feeds into the auger since a relatively large volume of crop material can be deposited into the discharge auger at that point.
- grinder-mixers utilizes a dust collection system that draws off the finely ground grain material that is suspended in the air from a chamber that is positioned atop an opening in the hammermill discharge auger.
- This design suffers the same basic disadvantage of tending to draw off the larger and generally heavier crop material, such as kernels of grain and portions of corn cobs, that already has been through the hammermill and is being transferred in the hammermill unloading auger to the mixing tank.
- Still another variation in design draws the air from the hammermill housing, cycles it up into the dust collector and then returns the settled crop material back into the hammermill on the rear side of the housing adjacent the fan.
- This type of a system will not only maximize the amount of ground crop material that is drawn off by the suction of the fan into the air stream directed to the cyclone separator, but also causes the settled out crop material to cause excessive and uneven wear on the hammers of the hammermill by concentrating the returned material's entry on one edge of the hammermill.
- One further grinder-mixer design in this area discharges the settled out particulate matter from the separator back into the infeed hopper of the hammermill.
- This type of a system tends to promote plugging in the separator outlet since the material being fed into the hammermill for grinding prevents the particulate matter from easily discharging from the separator outlet.
- the hammermill discharge auger transferring the ground crop material into the mixing tank does not plug with material in the discharge area as particulate material which is settled out of the air discharges into the top of the hammermill instead of the discharge auger.
- FIG. 1 is a side elevational view of a grinder-mixing apparatus adapted to be fastened to and powered by a tractor illustrating in partially diagrammatical and partially cut away detail the improved dust collection system.
- FIG. 1 there is shown a general representation of a grinder-mixing apparatus 10 adapted to be fastened to a tractor which provides not only the motive power to transport the apparatus from one location to another, but also serves as the power source for the rotary driven components of the grinder-mixer apparatus 10.
- the grinder-mixer 10 comprises a frame having parallel side frame members 11 connected to a front cross support member 12 and a rear cross support member 14. Connected to the front cross support member 12 by converging hitch members 16 is a towing hitch 15 which is adapted to be suitably fastened to the tractor.
- a power takeoff shaft (not shown) connects to the power takeoff driving shaft of the tractor to drive the rotary components of the grinder-mixer 10.
- These structural members comprise a lower frame, indicated generally by the numeral 18, which supports the main grinding and mixing components.
- the lower frame 18 is mobilely supported by a pair of wheels 19 (only one of which is shown) mounted to axle and support beam 20.
- the lower frame 18 has suitably mounted thereon a mixing tank 21 which is braced by tank supports 22 connected to the tank 21 and the frame members of the lower frame.
- the tank 21 has an internally supported, substantially upright shaft 24 extending upwardly from the bottom of the tank toward the top.
- the shaft 24 has a vertical auger 25 with flighting spirally mounted about the shaft.
- a short distance above the base of the mixing tank 21 vertical auger 25 has a generally cylindrically shaped vertical auger housing 27 which surrounds the auger 25 and extends generally upwardly toward the top of the tank 21.
- the auger 25 is driven conventionally from the power takeoff shaft (not shown) that is connected to the tractor. Power is transferred to a partially illustrated input drive shaft 29 at the base of the tank 21.
- a driving gearbox 28 transfers the power from the input shaft 29 to the auger 25.
- Hammermill 34 Forwardly of the mixing tank 21 and suitably mounted atop the lower frame 18 of the hammermill 34.
- Hammermill 34 is encased with a housing, indicated generally by the numeral 32.
- the hammermill 34 is of a conventional type and has a plurality of rotating hammer elements 36 mounted about a series of shafts attached to main hammermill rotor shaft 35.
- Shaft 35 extends through the entire length of the hammermill housing 32 and at its rearmost end has sheave 38 fastened thereto.
- Sheave 38 is connected via a belt (not shown) to the previously mentioned power takeoff shaft to provide the transfer of rotary power to the hammermill 34.
- the hammermill housing 32 further has an infeed hopper area, indicated by the numeral 39, where crop material is directed into one side of a hammermill and then downwardly onto the rotating hammermill.
- the ground crop material is then discharged from the hammermill area through the housing outlet area 40 into a hammermill discharge auger 30 that is positioned within an auger trough 31.
- Individual arcuately shaped screens (not shown), each having differently sized apertures therein, can be inserted in the outlet area 40 beneath the hammermill 34 and above the discharge auger 30.
- These screens serve to more finely size the crop material after it has been ground in the hammermill by having the material pass therethrough from the combined effect of the suctioning force of the air flow created by the fan 42 and the pressure of crop material being directed downwardly thereagainst by the rotating hammermill 34. Generally only one screen at a time is used.
- the discharge auger 30 ultimately feeds into the mixing tank 21.
- the dust collection system includes a fan 42 mounted about the forward portion of shaft 35.
- Fan 42 draws air out of a draw chamber 41 adjacent the hammermill and directs air and crop material suspended in the air adjacent the hammermill upwardly in an air stream through fan outlet duct 45.
- Housing 44 surrounds the fan 42 and facilitates the passing of crop material in the air stream upwardly into the outlet duct 45.
- Air duct 46 connects to the outlet duct 45 on its lowermost end and to elbow infeed duct 48 at its uppermost end.
- Duct 48 is then joined to a conventional cyclone separator and dust collector 49.
- the separator and dust collector 49 has an infeed housing 50 and a settling duct 51 which serves to close the air flow loop to the hammermill infeed duct 52.
- Hammermill infeed duct 52 is mounted on the top of the hammermill housing opposite the infeed hopper area 39. Thus a continuous loop of air flows from the hammermill draw chamber 41 to the fan 42, into the dust collector and cyclone separator 49 and back into the hammermill housing 32.
- the grinder-mixer has crop material fed into the feed hopper 39 of the hammermill 34.
- Crop material passes down into contact with the hammermill 34 and its rotating hammer elements 36, where it is ground into fine particles.
- the crop material particles are then discharged through a screen at the bottom of the hammermill housing outlet area 40 into the auger trough 31 where it is carried rearwardly by the discharge auger 30 to the mixing tank 21.
- the crop material enters the bottom of the mixing tank 21 and is transported by the vertical auger 25 upwardly in the conventional manner to obtain a well mixed feed mixture.
- Crop material particles suspended in the air adjacent the hammermill are drawn off through a draw chamber 41 by the suction force of fan 42.
- Fan 42 imparts sufficient force to the air to generate an air flow that passes upwardly through fan outlet duct 45, air duct 46 and elbow infeed duct 48 to deliver the crop material to the cyclone separator and dust collector 49.
- the air flow with its suspended particulate matter, is passed into the infeed housing 50 where the cyclone separator settles out the particulate crop material.
- the crop material then is directed downwardly through settling duct 51 into infeed duct 52.
- Infeed duct 52 is positioned generally centrally and atop the hammermill housing 32 to direct the settled out crop material back into the hammermill through which it can pass into the auger trough for ultimate transfer to the mixing tank.
Landscapes
- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Disintegrating Or Milling (AREA)
Abstract
Description
Claims (13)
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US06/026,261 US4213571A (en) | 1979-04-02 | 1979-04-02 | Dust system for a grinder-mixer |
CA000345129A CA1134793A (en) | 1979-04-02 | 1980-02-05 | Dust system for a grinder-mixer |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US06/026,261 US4213571A (en) | 1979-04-02 | 1979-04-02 | Dust system for a grinder-mixer |
Publications (1)
Publication Number | Publication Date |
---|---|
US4213571A true US4213571A (en) | 1980-07-22 |
Family
ID=21830785
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US06/026,261 Expired - Lifetime US4213571A (en) | 1979-04-02 | 1979-04-02 | Dust system for a grinder-mixer |
Country Status (2)
Country | Link |
---|---|
US (1) | US4213571A (en) |
CA (1) | CA1134793A (en) |
Cited By (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5415356A (en) * | 1993-03-30 | 1995-05-16 | Continental Products Corporation | Reducing assembly for rotary drum mixers |
US5622320A (en) * | 1996-03-26 | 1997-04-22 | Old Dominion Brush Company | Foilage compactor apparatus |
US5906435A (en) * | 1993-09-13 | 1999-05-25 | Continental Products Corporation | Particulate drum mixer with scoop section and seal assembly with bladder |
US6713112B1 (en) * | 2000-09-12 | 2004-03-30 | Scott Equipment Company | Meal cooler centrifugal separator |
EP1689503A2 (en) * | 2003-12-02 | 2006-08-16 | Huber Engineered Woods LLC | Cyclone with plug prevention |
US20070108321A1 (en) * | 2005-11-16 | 2007-05-17 | Rodney Booth | Grinding mill with air recirculation |
US20110186664A1 (en) * | 2010-01-29 | 2011-08-04 | Scott Equipment Company | Dryer/Grinder |
US8967923B2 (en) | 2012-01-13 | 2015-03-03 | Aeg Electric Tools Gmbh | Dust suction device for drilling machine |
USD776723S1 (en) * | 2015-04-15 | 2017-01-17 | Pmp Pro-Mec S.P.A. | Drive for the drum of a concrete mixer |
USD777802S1 (en) * | 2015-04-15 | 2017-01-31 | Pmp Pro-Mec S.P.A. | Drive and drum of a concrete mixer |
US9776296B2 (en) | 2008-05-09 | 2017-10-03 | Milwaukee Electric Tool Corporation | Power tool dust collector |
US10086381B2 (en) * | 2014-03-13 | 2018-10-02 | Steven Cottam | Grinder mill air filter |
WO2020047678A1 (en) * | 2018-09-07 | 2020-03-12 | Brewin Roy | Crop dust separation system |
US10655300B2 (en) | 2017-07-14 | 2020-05-19 | Vermeer Manufacturing Company | Cyclonic separation systems and hydro excavation vacuum apparatus incorporating same |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3840189A (en) * | 1973-05-23 | 1974-10-08 | Owatonna Mfg Co | Feed mill and mixer |
-
1979
- 1979-04-02 US US06/026,261 patent/US4213571A/en not_active Expired - Lifetime
-
1980
- 1980-02-05 CA CA000345129A patent/CA1134793A/en not_active Expired
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3840189A (en) * | 1973-05-23 | 1974-10-08 | Owatonna Mfg Co | Feed mill and mixer |
Cited By (23)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5415356A (en) * | 1993-03-30 | 1995-05-16 | Continental Products Corporation | Reducing assembly for rotary drum mixers |
US5906435A (en) * | 1993-09-13 | 1999-05-25 | Continental Products Corporation | Particulate drum mixer with scoop section and seal assembly with bladder |
US5622320A (en) * | 1996-03-26 | 1997-04-22 | Old Dominion Brush Company | Foilage compactor apparatus |
US6713112B1 (en) * | 2000-09-12 | 2004-03-30 | Scott Equipment Company | Meal cooler centrifugal separator |
EP1689503A2 (en) * | 2003-12-02 | 2006-08-16 | Huber Engineered Woods LLC | Cyclone with plug prevention |
EP1689503A4 (en) * | 2003-12-02 | 2007-07-04 | Huber Engineered Woods Llc | Cyclone with plug prevention |
US20070108321A1 (en) * | 2005-11-16 | 2007-05-17 | Rodney Booth | Grinding mill with air recirculation |
US7828236B2 (en) * | 2005-11-16 | 2010-11-09 | Rodney I. Booth | Grinding mill with air recirculation |
US11883917B2 (en) | 2008-05-09 | 2024-01-30 | Milwaukee Electric Tool Corporation | Power tool dust collector |
US10695880B2 (en) | 2008-05-09 | 2020-06-30 | Milwaukee Electric Tool Corporation | Power tool dust collector |
US11712771B2 (en) | 2008-05-09 | 2023-08-01 | Milwaukee Electric Tool Corporation | Power tool dust collector |
US9776296B2 (en) | 2008-05-09 | 2017-10-03 | Milwaukee Electric Tool Corporation | Power tool dust collector |
US11077533B2 (en) | 2008-05-09 | 2021-08-03 | Milwaukee Electric Tool Corporation | Power tool dust collector |
US8714467B2 (en) | 2010-01-29 | 2014-05-06 | Scott Equipment Company | Dryer/grinder |
US20110186664A1 (en) * | 2010-01-29 | 2011-08-04 | Scott Equipment Company | Dryer/Grinder |
US9174220B2 (en) | 2010-01-29 | 2015-11-03 | Scott Equipment Company | Dryer/grinder |
US8967923B2 (en) | 2012-01-13 | 2015-03-03 | Aeg Electric Tools Gmbh | Dust suction device for drilling machine |
US10086381B2 (en) * | 2014-03-13 | 2018-10-02 | Steven Cottam | Grinder mill air filter |
USD777802S1 (en) * | 2015-04-15 | 2017-01-31 | Pmp Pro-Mec S.P.A. | Drive and drum of a concrete mixer |
USD776723S1 (en) * | 2015-04-15 | 2017-01-17 | Pmp Pro-Mec S.P.A. | Drive for the drum of a concrete mixer |
US10655300B2 (en) | 2017-07-14 | 2020-05-19 | Vermeer Manufacturing Company | Cyclonic separation systems and hydro excavation vacuum apparatus incorporating same |
WO2020047678A1 (en) * | 2018-09-07 | 2020-03-12 | Brewin Roy | Crop dust separation system |
US20210315163A1 (en) * | 2018-09-07 | 2021-10-14 | Roy BREWIN | Crop dust separation system |
Also Published As
Publication number | Publication date |
---|---|
CA1134793A (en) | 1982-11-02 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: NEW HOLLAND INC., 500 DILLER AVENUE, NEW HOLLAND, Free format text: ASSIGNMENT OF ASSIGNORS INTEREST. SUBJECT TO CONDITIONS OF AGREEMENT RECITED;ASSIGNOR:SPERRY RAND CORPORATION;REEL/FRAME:004623/0904 Effective date: 19860327 |
|
AS | Assignment |
Owner name: FORD NEW HOLLAND, INC., 500 DILLER AVENUE, NEW HOL Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:NEW HOLLAND INC., A CORP. OF DE.;REEL/FRAME:004879/0501 Effective date: 19871222 Owner name: FORD NEW HOLLAND, INC., A CORP. OF DE., PENNSYLVAN Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:NEW HOLLAND INC., A CORP. OF DE.;REEL/FRAME:004879/0501 Effective date: 19871222 |
|
AS | Assignment |
Owner name: BLUE LEAF I.P., INC., DELAWARE Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:FORD NEW HOLLAND, INC.;REEL/FRAME:007388/0102 Effective date: 19941215 |